Metal-planing machine.



No'.879,784. PATENTED FEB.18,'1908.

E. P. CARPENTER. A

METAL PLANING MACHINE. APPLICATION FILED numb. 1905,

WI TNESSEE //v VEN TUR,

EDWIN P. CARPENTER, OF PAWTUOKET, RHODE ISLAND.

METAL-PLANING MACHINE.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed March 20. 1905. Serial No. 251.145-

To all whom it may concern:

Be it known that I, EDWIN P. CARPENTER, a citizen of the United States,residing at the city of Pawtucket, in the county of Providence and Stateof Rhode Island, have invented certain new and useful Improvements inMetal-Planing Machines, of which the following is a specification.

My invention relates to an improved feeding mechanism adapted for ametal planing machine.

The object'of my invention is to provide a feeding mechanism forengagement with the vertical rack-bar and arranged to impart acontinuous movement in one direction, to the feed-screw of thecross-head.

The construction and arrangement of details of my invention will bedescribed in the following specification, reference being had to theaccompanying sheet of drawings, wherein:

Figure 1 represents a partial top plan view of the cross-head-frame,showing respectively the cross-head, the tool-holder mounted thereon,the feed-shaft and feed screw, together with my improved feedingmechanism for imparting a continuous motion to the latter. Fig. 2 is avertical sectional view, taken on line y.-y. of Fig. 1, showing thefront end of my improved feeding-mechanism. Fig. 3 is an enlargedsectional view through the feeding mechanism, taken on line 2.2. of Fig.2, and showing the rack-bar in dotted outline, and, Fig. 4 is a rear endelevation of the feeding-mechanism.

Like numerals indicate like parts.

1 represents a partial sectional view of the machine-frame, which is ofa size and shape to properly support the cooperating parts. 2 representsthe crosshead-frame secured to said machine-frame and located above thelevel of the work-table 3. The cross-headframe 2 is provided with edgeribs 4, 4 to guide and support the slide-block 5, on which is mountedthe feed-screw-holder 6, having the usual screw-rod 7 for manualadjustment of said holder. On the feed-screw-holder 6 is secured thehead-piece 8 to which is bolted the tool-holders 9, 9, which carry thecuttingtools 10, 10. The tool-holders 9 are clamped to the head-piece 8,by a plate 16, through which bolts 17, 17 pass and are secured in saidpiece 8. 18 represents the feed-shaft which has operative connectionwith the usual bevel gear arrangement (not shown) to impart an up anddown movement to the cross head. 19 represents the feed screw which hasthreaded connection with the slide-block 5, in the usual manner. The forward terminals of the feed-shaft 18 and feedscrew 19 are provided withcollars 20 and 21 which are slidable upon keys secured in theirrespective shafts, and each of said collars formed with a pinion gear 22and 23 respectively, as shown. The aforesaid parts being of the ordinaryconstruction and arrangement, common to machines of this class.

On the side of the cross-head-frame 2, ad jacent the terminals of thefeed-shaft 18 and the feed-screw 19, are mounted two shafts 24 and 25,each revolubly supported in the journal bearings of a plate 26, which isbolted to said frame 2, as shown in Figs. 1 and 3. The inner terminal ofthe shaft 24 is provided with a spur gear 27, loose upon said shaft andcarrying a pawl 28. A ratchet wheel 29 is keyed upon the shaft 24, ad-

jacent the gear 27 and arranged to be engaged by the pawl 28. The innerterminal of the shaft 25 is provided with a spur gear 30, loose uponsaid shaft and carrying a pawl A ratchet wheel 32 is keyed upon theshaft 25, adjacent the gear 30, and arranged to be engaged by the pawl31. The gears 27, 30 are in vertical alinement and at all times in meshwith the reciprocating rack-bar 33. The forward end of the shaft 24 iskeyed to a spur gear 34, which is in mesh with an equal size gear 35keyed upon the shaft 25. On the shaft 25, adjacent the gear 35, is keyeda large spur gear 36, of a size to mesh with either of the pinion gears22 or 23, of the feed-shaft or feed-screw, when desired.

When a casting is mounted in position to be planed or finished, thepinion gear 23 is moved manually into mesh with the large spur gear 36,and as the rack-bar 33 descends the loose gear 30 rotates, and its pawl31 causes the ratchet wheel 32 to revolve the shaft 25, and the largespur gear 36 being keyed to this latter shaft and in mesh with thepinion gear 23, causes the feed-screw 19 to revolve, by this saiddownward move ment of the rack-bar 33. The large spur gear 36 alwaysrotates in the same direction, as indicated by the arrow in Fig. 2. Asthe rack-bar 33 ascends the pawl of the loose gear 27 engages theratchet wheel 29, thus rotating the shaft 24 in a direction the reverseof that indicated by the arrow in Fig. 4, and at the same time thismovement causes, by means of the meshed gears 34, 35, to revolve theshaft in the direction i n dicated by the arrow in Fig. 2, therebytransknitting motion to the gears 36, 23 and causing the feed-screw 19to be driven in the same direction, by this upward movement of therack-bar 33, as by the latters downward movement already described.Therefore, by my construction and arrangement of parts, I provide afeeding mechanism for a metal planing machine whereby the rack-bar iscaused to impart a continuous rotative movement of the feed-screw 19,with each upward and downward movement of said bar.

What I claim and desire to secure by Letters-Patent, is-

In a metal planing machine, the combination with the feed-rack-bar andfeed-screw having pinion thereon, of a plate secured to themachine-frame and provided with journal bearings; two horizontallyarranged shafts rotatably mounted on the journal. bearings of saidplate; a gear loose on each of said shafts and in mesh with therack-bar; a ratchet wheel keyed on each of said shafts and each wheelhaving itsteeth disposed in the reverse order of the other wheel; a pawlcarried by each of said gears to engage the teeth of said wheels; a gearkeyed on each of said shafts and in mesh with each other; and a gearkeyed on one of said shafts and arranged to mesh with the pinion-gear ofthe feed-screw, substantially as shown and for the purpose specified.

In testimony whereof I afiiX my signature in presence of two witnesses.

EDWIN P. CARPENTER.

Witnesses:

JosEPH DERMODY, CHARLES F. BLACK.

